DOP-3948

[seungpark]

DOP-3948

Goal: Convert page documents from parser into manifest entries for search.documents[], namely the "facets" field

Example of output page documents from parser is included in the ticket.
Updated bson includes an update to the expected page document:

{
	"page_id": "cloud-docs/seung.park/DOP-3851-b-test-facet-directives/reference/google-gcp",
	"filename": "reference/google-gcp.txt",
	"ast": {...},
	"source": "",
	"static_assets": [...],
	"facets": [
		{
			"category": "programming_language",
			"value": "cpp",
			"sub_facets": null
		},
		{
			"category": "genre",
			"value": "reference",
			"sub_facets": null
		},
		{
			"category": "target_product",
			"value": "atlas",
			"sub_facets": [
				{
					"category": "sub_product",
					"value": "search",
					"sub_facets": null
				}
			]
		}
	]
}

[i80and]

Just a couple syntax notes

[rayangler]

LGTM!